He is known for his work as a voice artist on the satirical puppet show Spitting Image and for impersonating Margaret Thatcher on television throughout her time as Prime Minister of the UK (1979–1990).
In his career Steve Nallon has performed a number of roles and characters as an actor and as a voice artist in theatre, film, television and radio.
Whilst still at school, he developed a comedy act and performed from the age of 16 in local working men's clubs in Yorkshire and the North.
Although Nallon became well known for providing the voice of Margaret Thatcher on the show, he also voiced many of the show's other characters, including Roy Hattersley, The Queen Mother, Alan Bennett, David Attenborough, Harold Wilson, Bruce Forsyth, Robert Runcie, Edward Heath, Shirley Williams, David Frost and Malcolm Rifkind.
As an actor, Nallon has performed in several musicals including as Narrator in The Rocky Horror Show at Leicester Haymarket Theatre and as Jacque in Carnival as part of a staged reading at the Barbican.
Other voice artist credits include the video game Overlord and the mobile app Headcaster (2016) as David Cameron and Jeremy Corbyn.
[3] Nallon has provided the voice of Margaret Thatcher since 2011 in the BBC Radio Four series UK Confidential which examines Government Cabinet papers released under the 30-year rule.
In 2016 voiced Thatcher for the national tour of the theatre dance show Coal created by Gary Clarke which included a section on the miners' strike of 1985.
Destination Time Travel (ISBN 978-1-80425-101-0), co-written with Dick Fiddy, archivist at the British Film Institute, was published in 2023 by Luath Press.
The book was published to coincide with the Destination Time Travel season at the British Film Institute in October and November 2023.